* subversion/include/svn_wc.h (svn_wc_external_item_t): Fix parameter name   to be consistent with documentation.
* subversion/include/svn_wc.h (svn_wc_external_item_t): Fix parameter name
  to be consistent with documentation.

Suggested by: julianfoad

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion